5,6-Dibromoacenaphthene is a byproduct during the synthesis of 3,?5,?6-?Tribromo-?1,?2-?dihydroacenaphthylene (T771875), a derived from Acenaphthene (1,2-Dihydro Acenaphthylene) (D448330), which is a polycyclic aromatic hydrocarbons as carcinogenic agents.